The　study　and　application　of　PTR　algorithm　on　recognizing　various　structure　samples     

王碧泉  黄汉明  范洪顺 《地震学报(英文版)》1994,7(1):1-13

ＴｈｅｓｔｕｄｙａｎｄａｐｐｌｉｃａｔｉｏｎｏｆＰＴＲａｌｇｏｒｉｔｈｍｏｎｒｅｃｏｇｎｉｚｉｎｇｖａｒｉｏｕｓｓｔｒｕｃｔｕｒｅｓａｍｐｌｅｓＢｉ－ＱｕａｎＷＡＮＧ（王碧泉）；Ｈａｎ－ＭｉｎｇＨＵＡＮＧ（黄汉明）ａｎｄＨｏｎｇ－ＳｈｕｎＦＡＮ（范洪...  相似文献   

新一代试样分解技术—微波溶样的现状与展望   总被引：2，自引：1，他引：2  

汪模辉  罗方若 《矿物岩石》1995,15(1):87-91

本文通过回顾新一代试样分解技术－微波溶样的发展过程，在详述微波密封溶解优点的基础上，研讨了微波溶样的原理和有关设备的选择与设计，本文还评述了这一新技术的应用现状并展望该技术在分析领域中今后的发展前景。  相似文献   

A Simulation Study of Smoothness Methods In Recovery of Regional Gravity Fields   总被引：8，自引：0，他引：8  

Peiliang Xu  Reiner Rummel 《Geophysical Journal International》1994,117(2):472-486

  相似文献   

Interaction of powered supports and the strata in coal seams under a heavy roof     

Budirský  Stanislav 《Geotechnical and Geological Engineering》1985,3(2):113-138

Summary The interaction of powered supports and the strata in thick coal seams under a heavy roof is discussed when subjected to anomalous phenomena, particularly rock bursts, which have occurred in the Upper Silesian Coal Basin in the last few years. On the basis of the results of long-term field measurements and theoretical analyses, the necessary setting and yield loads of powered supports as well as loading patterns which appear during rock bursts have been determined. A methodology for the testing of powered supports destined for coal seams prone to rock bursts, for the implementation of which a rapid closure rig should be built, is proposed.  相似文献   

Sampling design optimization for spatial functions   总被引：4，自引：0，他引：4  

Ricardo A. Olea 《Mathematical Geology》1984,16(4):369-392

A new procedure is presented for minimizing the sampling requirements necessary to estimate a mappable spatial function at a specified level of accuracy. The technique is based on universal kriging, an estimation method within the theory of regionalized variables. Neither actual implementation of the sampling nor universal kriging estimations are necessary to make an optimal design. The average standard errorand maximum standard error of estimationover the sampling domain are used as global indices of sampling efficiency. The procedure optimally selects those parameters controlling the magnitude of the indices, including the density and spatial pattern of the sample elements and the number of nearest sample elements used in the estimation. As an illustration, the network of observation wells used to monitor the water table in the Equus Beds of Kansas is analyzed and an improved sampling pattern suggested. This example demonstrates the practical utility of the procedure, which can be applied equally well to other spatial sampling problems, as the procedure is not limited by the nature of the spatial function.  相似文献   

甚高频时岩石介电常数的测试方法和特性   总被引：2，自引：0，他引：2       下载免费PDF全文

施咸迪  沈良玑 《地球物理学报》1989,(1)

本文讨论20—200MHz频率范围内平行板电容法测量岩石介电常数和电导率的方法,指出常用的静电场公式的局限性,给出较精确的似稳场动态公式,并讨论20—50MHz频率范围内的岩石介电特性。  相似文献   

RSM仪与场地剪切波波速测试技术   总被引：2，自引：1，他引：2  

刘明贵  郭铁栓 《岩土力学》1994,15(1):57-64

介绍了采用检层法进行场地剪切波波速测试的技术和应用以及这种方法的原理、发展历史、测试技术和计算方法。本文还简要介绍了ＲＳＭ的设备和软件以及作者的现场实测经验  相似文献   

THE DEGRADABILITY OF PARTICULATE ORGANIC MATTER IN THE GIRONDE ESTUARY, FRANCE   总被引：4，自引：0，他引：4  

林荣根 《中国海洋湖沼学报》1994,12(2):106-113

The degradability of particulate organic matter(POM)in the Gironde Estuary(France)was measuredusing the incubation technique.The influence of sample treatment and incubation conditions on the re-sults was evaluated.A mathematical model was successfully used to describe the various degradationcurves.Results showed that the upstream POM had very high degradability;the central estuaryPOM had low degradability;and that the mouth POM degradability was between that of central POM(low degradability)and marine POM(high degradability).  相似文献   

一种遥感影像分类精度检验的新方法   总被引：7，自引：0，他引：7  

郑明国  蔡强国  秦明周  岳天祥 《遥感学报》2006,10(1):39-48

遥感影像中属于某类别的特征向量服从正态分布，基于此理论，根据统计学原理，提出一种新的基于类别分布的分类精度检验方法，该方法与常规基于混淆矩阵的分类精度检验方法完全不同，不需检验数据，仅需要一定的样本数据来估计总体的分布，可直接利用监督分类的训练区进行，因此对监督分类而言工作量极小。该方法能够进行的关键是类别总体的分布能通过某一分布的假设检验，在这种情况下可方便地计算出该类别的生产者精度，同时根据类别均值向量对应的像元数目和均值向量在类别总体中出现的概率计算出类别总体的数目后，可计算出各类别的用户精度，然后根据各类别的用户精度和分类后各类别分布面积比例计算出分类总精度。最后以郑州市高密度建设用地分类的生产者精度数据的获取为例进行了实证研究。研究表明：对于总体分布与正态分布最接近的两个波段的分类结果，本方法的计算结果与常规方法的计算结果在统计意义上可以认为一致。  相似文献   

交通系统中桥梁的抗震分析     

姜淑珍  包峰  刘如山 《世界地震工程》2006,22(4):59-62

桥梁抗震防灾研究也可以说是桥梁易损性分析问题,Pushover分析方法具有表达非线性静力分析的特性,而在桥梁抗震分析和计算方面也表现出较好的适应能力,阐述该方法的基本原理,并用桥梁实际震害样本与Pushover分析方法计算结果进行对比,其对比结果表明,用Pushover分析方法计算出的结果比较符合实际震害情况,显然该法对处理一般性桥梁问题是可行和有效的。  相似文献